[BugFix] Revamp the usage of list syntax on routines

[hjoaquim]

1. Why? (1-3 sentences or a bullet point list):

   • Recover the usage of list syntax inside routines.

2. What? (1-3 sentences or a bullet point list):

   • Treat the argument -i/--input as a string initially and skip those on split comma separated arguments.
   • Use a regular expression to handle list-like syntax before parsing the openbb script.

3. Impact (1-2 sentences or a bullet point list):

   • Minimal 3/40

Impact Analysis

User Experience (UX) Impact:
    0: No change to UX

Performance Impact:
    0: Neutral

Compatibility Impact:
    2: Minor compatibility issues

    > older versions wont have this upgrade.


Security Impact:
    0: Neutral

Scalability Impact:
    1: Minor scalability improvements/challenges

    > we might have challenges if other syntaxes are introduced

Maintenance Impact:
    1-2: Minor maintenance impact

    > we might have challenges if other syntaxes are introduced

Compliance Impact:
    0: Fully compliant, no changes

Dependency Impact:
    0: No change

Scoring:

Total Score: 3 / 40

4. Testing Done:

   • Create a routine with the following content: /equity/price/historical --symbol $ARGV[0] --start_date $ARGV[1] --provider yfinance --chart
   • Run it with multiple symbols: exe --file xpto.openbb --input [AAPL,MSFT],2024-01-01

[deeleeramone]

Nice! I think this also takes care of FOREACH loops.