Add terminal-suggest support for the codium and codium-insiders commands

[manuth]

Only recently, Visual Studio Code added experimental support for providing suggestions for auto-completing terminal commands for both the code and the code-insiders commands by enabling the terminal.integrated.suggest.enabled option.

Changes made in this PR extend this behavior by adding the very same auto completion capabilities for the codium and the codium-insiders commands, too.

[daiyam]

Instead of a patch, in prepare_vscode.sh, I would add:

# terminal-suggest
replace "s|'code'|'codium'|" extensions/terminal-suggest/src/completions/code.ts
replace 's|Visual Studio Code|VSCodium|' extensions/terminal-suggest/src/completions/code.ts
replace 's|code-insiders|codium-insiders|' extensions/terminal-suggest/src/completions/code-insiders.ts
replace 's|Visual Studio Code Insiders|VSCodium Insiders|' extensions/terminal-suggest/src/completions/code-insiders.ts