Centralization of semicolon-delimited value handling for the multi-value control by introducing a shared codec utility

[tbernard-dennemeyer]

Dear,

This change refactors multi-value field handling to use a single shared codec so parsing and serialization are consistent across the extension.

Changed files

[valueCodec.ts]
Added shared parsing logic for semicolon-delimited values.
Added shared serialization logic that trims entries, removes empty values, and joins with semicolons.
Added compatibility helper for allowed-values behavior.
[MultiValueEvents.tsx]
Replaced inline split/trim parsing with shared codec parsing.
Replaced inline join serialization with shared codec serialization.
[getSuggestedValues.ts]
Replaced inline split/trim parsing of configured Values input with shared codec parsing.

Sample values

Input selections:
Customer A
Customer B
Serialized value:
Customer A;Customer B
Parsed result:
Customer A
Customer B

Outcome

One canonical implementation for value parsing/serialization.
Cleaner maintenance and fewer inconsistencies between read/write paths.

[tbernard-dennemeyer]

@microsoft-github-policy-service agree [company="Dennemeyer"]

[tbernard-dennemeyer]

@microsoft-github-policy-service agree company="Dennemeyer"