Add input validation for component name inputs

[Zaperex]

What needs to be done?

We need to add input validation for the component name inputs to ensure they satisfy the default format specified in the backstage architectural decisions docs:

• Strings of length at least 1, and at most 63 (from testing, it's observed that it should actually be at most 62 chars)
• Must consist of sequences of [a-z0-9A-Z] possibly separated by one of [-_.]

For this default format, we will need to add the following pattern validation for the input field:

properties:
  <propertyName>:
    title: Component Name
    type: string
    pattern: ^([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9]$
    maxLength: 63

The 62 maxLength is because the catalog appears to actually not accept names that are 63 characters long.

- Tested with c0mponent-name_1234567890.abcdefghijklmnopqrstuvwxyz-abcdefghi_ which is exactly 63 chars long, but it got rejected.

- Tested with c0mponent-name_1234567890.abcdefghijklmnopqrstuvwxyz-abcdefghi, and it was accepted and ingested into the catalog/

This should prevent invalid names from being entered:

[Zaperex]

Correction: It seems I have misinterpreted the backstage entity name requirements. The [-_.] characters have to be used as separators not as leading or ending characters.
Which is why c0mponent-name_1234567890.abcdefghijklmnopqrstuvwxyz-abcdefghi_ doesn't work. However something like c0mponent-name_1234567890.abcdefghijklmnopqrstuvwxyz-abcdefghij will work.

[Zaperex]

Update: should be using ^([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9]$ instead