Feature request: TEXTALIGN command (align and space several text objects) #2144

What is missing

OpenCADStudio has no TEXTALIGN command. In AutoCAD, TEXTALIGN lines up several text objects (TEXT, MTEXT,
attribute definitions) against a base text, along a vertical, horizontal or picked direction, and can space them
evenly. It is a common cleanup step on drawings with many labels, for example drawings that came from a PDF import.

The command name is already referenced in the alias table, so the alias is dead today:
src/app/alias/pgp.rs:221 maps ALINEARTEXTO → TEXTALIGN, but no TEXTALIGN command is registered.

Not covered by existing commands

• JUSTIFYTEXT changes the justification point of each text without moving it.
• TORIENT changes the rotation.
• ALIGN TEXT orizzontally and vertically? #246 (align text horizontally/vertically, closed) appears to be covered by those; neither moves several texts
  into one line or column relative to a base text.

Expected behaviour (as in AutoCAD)

Prompts in AutoCAD:

Current settings: Align = Left, Spacing Mode = Current Vertical
Select text objects to align [alIgnment/Options]:
Select text object to align to [Point]:
Pick second point or [Options]:

1. Select the texts to move.
2. Pick the base text, which stays in place (or Point to align to a picked point).
3. Pick a second point: the alignment direction from the base text; with ortho on this gives a clean column or row.
4. Each selected text moves along the alignment line; content, height, rotation and style don't change.

alIgnment chooses Left / Center / Right. With Left, AutoCAD lines up the left edge of each text's
text box (the drawn glyphs, as textbox reports them), not the insertion point. A text whose first glyph has
a small left side bearing therefore ends with an insertion X slightly below the base's.

Options:

• Distribute: spread the texts evenly between two picked points.
• Set spacing: a fixed distance between the texts.
• Current vertical / Current horizontal: align in a column or row and keep the existing spacing.

Undo restores everything in one step.

Suggested acceptance check (checked in AutoCAD)

TEXT A at (0,0), B at (0,13), CCCCCC at (20,30), height 2.5, Standard style, left justified.
TEXTALIGN, select B and CCCCCC, pick A as the base, second point (0,50).
Result in AutoCAD: A unchanged; B and CCCCCC keep Y = 13 and Y = 30, and their insertion X becomes
base_box_left - own_box_offset (here about -0.26 and -0.18 with the txt font), so all three text boxes start at
the same X. Nothing else in the entities changes.