docs: update CLI docs to note vcctl is not in release packages

[atul-upadhyay-7]

• Please check if the PR fulfills these requirements

• The commit message follows our guidelines

• What kind of change does this PR introduce?
  /kind documentation

• What this PR does / why we need it:
  Updates the CLI documentation to clearly state that vcctl is not included
  in official Volcano release packages and must be built from source.

Also fixes several Markdown formatting issues:

• Added missing code fences around bare command examples
• Fixed wrong language tag (html → bash)
• Added proper installation prerequisites (Go, Git)
• Added complete build-from-source workflow
• Fixed abrupt file ending

• Which issue(s) this PR fixes:
  Fixes there is no vcctl in release packages. #123

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[volcano-sh-bot]

Welcome @atul-upadhyay-7! It looks like this is your first PR to volcano-sh/website 🎉

[gemini-code-assist]

Code Review

This pull request updates the CLI documentation for vcctl in docs/CLI/Commandline.md by adding installation prerequisites, build-from-source instructions, and formatting the command-line reference examples. The review feedback highlights an incorrect command structure in one of the examples (vcctl delete job instead of vcctl job delete) and suggests updating the corresponding Chinese translation file to keep the documentation synchronized.

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[atul-upadhyay-7]

Hey @JesseStutler thanks for the review! I've updated the PR — removed the "not included in release packages" note from both the English and Chinese docs since #5384 is already tracking vcctl inclusion in the release artifacts.

The PR now just focuses on fixing the markdown formatting issues (missing code fences, wrong language tags, incorrect command order) and adding proper build-from-source steps. Let me know if anything else needs updating!

[atul-upadhyay-7]

@JesseStutler @Arhell @william-wang could you review this pr