optimize package size

Signed-off-by: Qingpeng Li <qingpeng9802@gmail.com>

Author: qingpeng9802

.vscodeignore

@@ -1,29 +1,21 @@
-# vscode
-.vscode/**
-.vscode-test/**
-.vscode-test-web/**
-vsc-extension-quickstart.md
-*.vsix
+# Ignore everything
+*
+*/**
 
-# git
-.gitignore
-.github/**
+# Whitelist
+!package.json
 
-# node
-src/**
-out/**
-node_modules/**
-webpack.config.js
-**/tsconfig.json
-**/.eslintrc.json
-**/*.map
-**/*.ts
-*.log
+!dist/web/extension.js
 
-# dev
-assets/**
-scripts/**
-.parcel-cache
+!images/commonlisp_file_icon.svg
+!images/icon.png
 
-# prod
+!syntaxes/commonlisp.tmLanguage.json
+!syntaxes/cl_codeblock.tmLanguage.json
 
+!language-configuration.json
+!snippets/commonlisp_snippets.json
+
+!README.md
+!CHANGELOG.md
+!LICENSE

CONTRIBUTING.md

@@ -7,18 +7,18 @@ Hoping this guide will be helpful to you whether you would like to contribute, f
 ## Architecture  
 Let us first take a brief look at the design of this project.  
 
-![layers](./images/layers.png)  
+![layers](./images/doc/layers.png)  
 
 The image above shows the layers of the source code. `entry` initializes the extension and applies the vscode workspace configuration to the extension. `provider_interface` registers the providers in vscode. `builders` prepare the data structures from the raw text string/processed semantic information for vscode language features. `collect_info` collects the semantic information from the raw text string. `common` includes some constants and algorithms. `doc` is the interface for getting documentation.  
 
-If you are interested in a more detailed dependency graph, you can find the dependency graph in [`./images/dependency_graph.svg`](./images/dependency_graph.svg). Also, you can generate the dependency graph by running
+If you are interested in a more detailed dependency graph, you can find the dependency graph in [`./images/doc/dependency_graph.svg`](./images/doc/dependency_graph.svg). Also, you can generate the dependency graph by running
 > You may need to run `sudo apt install graphviz` first
 ```shell
-npx depcruise src --no-config --include-only "^src" --output-type dot | dot -T svg > ./images/dependency_graph.svg
+npx depcruise src --no-config --include-only "^src" --output-type dot | dot -T svg > ./images/doc/dependency_graph.svg
 ```
 
 ## Data Flow  
-![data_flow](./images/data_flow.svg)  
+![data_flow](./images/doc/data_flow.svg)  
 
 Please do not trust the correspondence between naming in the data flow diagram and naming in the source code since the naming in the source code is subject to change.  
 
@@ -86,6 +86,7 @@ Run `npm i -g @vscode/vsce` to install `vsce` globally since `vsce` is not in th
 
 Run `vsce package`.  
 Then, you will get a `common-lisp-x.x.x.vsix` in your `./` .
+> `.vscodeignore` uses whitelist mode. Run `npx vsce ls` to check what has been packaged.
 
 If you would like to use the packaged `.vsix` extension, you can load the `.vsix` extension to vscode by referring to [extension-marketplace install-from-a-vsix](https://code.visualstudio.com/docs/editor/extension-marketplace#_install-from-a-vsix).  
 

README.md

@@ -4,12 +4,12 @@ This VS Code extension supports Syntax Highlighting, Snippets, Completion, Hover
 ## Features
 
 ### Syntax Highlighting
-<img src="https://raw.githubusercontent.com/qingpeng9802/vscode-common-lisp/master/images/syntax_dark_plus.png">  
+<img src="https://raw.githubusercontent.com/qingpeng9802/vscode-common-lisp/master/images/doc/syntax_dark_plus.png">  
 
-<img src="https://raw.githubusercontent.com/qingpeng9802/vscode-common-lisp/master/images/syntax_light_plus.png">  
+<img src="https://raw.githubusercontent.com/qingpeng9802/vscode-common-lisp/master/images/doc/syntax_light_plus.png">  
 
 ### Snippets
-<img src="https://raw.githubusercontent.com/qingpeng9802/vscode-common-lisp/master/images/snippets.gif">
+<img src="https://raw.githubusercontent.com/qingpeng9802/vscode-common-lisp/master/images/doc/snippets.gif">
 
 ## Usage and Recommendation
 Beginner's Guide: [Overview](https://code.visualstudio.com/docs/languages/overview).  

images/data_flow.svg renamed to images/doc/data_flow.svg

@@ -270,7 +270,7 @@
             }
         }
     },
-    "icon": "images/icon.png",
+    "icon": "./images/icon.png",
     "repository": {
         "type": "git",
         "url": "https://github.com/qingpeng9802/vscode-common-lisp.git"