add keymap cheatsheet

KeyMapCheatSheet.md

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+# KeyMap Cheat-Sheet
+
+For anyone who is just starting with this neovim config!
+
+##### Note:
+
+- Vim Commands still work as they do one vanilla neovim
+- All keybinds can be changed according to one's preference in the `keymaps.lua` file located at `.../nvim/lua/user/lsp/`
+
+  - To make edits enter (Debian):
+
+    ```sh
+    cd ~/.config/nvim/lua/lsp
+    nvim keymaps.lua
+    ```
+
+  - [Explainer (Video)](https://www.youtube.com/watch?v=435-amtVYJ8&list=PLhoH5vyxr6Qq41NFL4GvhFp-WLd5xzIzZ&index=3)
+
+- All commands are case sensitive
+- Both `<CTRL>` keys (R, L) are supported for commands requiring to press one
+- Press `<SPACE>` to open
+
+**Helper Menu can be accessed via `<SPACE>`**
+
+## Normal mode
+
+One can trigger these key-binds directly
+
+#### Buffers (Open Files) Navigation
+
+| Key-Combination |        Action        | Vim Key-Combination |
+| :-------------: | :------------------: | :-----------------: |
+|   `<SHIFT>+l`   |   Open Next buffer   |      `:bnext`       |
+|   `<SHIFT>+h`   | Open Previous buffer |    `:bprevious`     |
+|   `<SPACE>+c`   | Close Current Buffer |        `:bd`        |
+
+#### Window Navigation
+
+| Key-Combination |        Action        |
+| :-------------: | :------------------: |
+|   `<CTRL>+h`    | Move to Left Window  |
+|   `<CTRL>+j`    | Move to Window Below |
+|   `<CTRL>+k`    | Move to Window Above |
+|   `<CTRL>+l`    | Move to Right Window |
+
+#### Window Resize (with arrows)
+
+| Key-Combination |     Action      |  Vim Key-Combination  |
+| :-------------: | :-------------: | :-------------------: |
+|   `<CTRL>+Up`   | Increase Height |     `:resize -2`      |
+|  `<CTRL>+Down`  | Decrease Height |     `:resize +2`      |
+|  `<CTRL>+Left`  | Increase Width  | `:vertical resize -2` |
+| `<CTRL>+Right`  | Decrease Width  | `:vertical resize +2` |
+
+> Note: Up, Down, Left and Right are the Arrow keys
+
+#### Move text
+
+| Key-Combination |    Action    | Vim Key-Combination |
+| :-------------: | :----------: | :-----------------: |
+|    `<ALT>+j`    | Move line up |      `:m .+1`       |
+|    `<ALT>+k`    | Move line up |      `:m .-2`       |
+
+#### Text Editing
+
+| Key-Combination |      Action      | Vim Key-Combination |
+| :-------------: | :--------------: | :-----------------: |
+|       `i`       |   Insert Mode    |         `i`         |
+|      `jk`       | Exit Insert Mode |       `<ESC>`       |
+
+## Visual Mode
+
+One needs to be in the visual mode for these binds to work
+
+> Note: Press `v` to enter visual mode
+
+#### Add Indentation
+
+| Key-Combination |    Action     | Vim Key-Combination |
+| :-------------: | :-----------: | :-----------------: |
+|       `<`       | Remove Indent |        `<gv`        |
+|       `>`       |  Add Indent   |        `>gv`        |
+
+#### Move text
+
+| Key-Combination |  Action   | Vim Key-Combination |
+| :-------------: | :-------: | :-----------------: |
+|    `<ALT>+j`    | Move Down |      `:m .+1`       |
+|    `<ALT>+k`    |  Move Up  |      `:m .-2`       |
+
+**For those who are beginning with vim/neovim please visit this [site](https://devhints.io/vim) for the basic commands**
+
+Feel free to contribute more to this file!