zsh: Move $PATH update export to zshrc

[Unique-Divine]

Problem

export PATH="$PATH:/home/realu/.foundry/bin" in zshenv was re-appending Foundry on every source. main_bash_setup sources zshenv and runs twice during normal zshrc startup (lines 9 and 321), so each new shell accumulated duplicate Foundry entries. Running myrc stacked more copies.

Fix

• Removed the Foundry PATH line from zshenv
• Added it to zshrc next to the other toolchain PATH exports (after linuxbrew)

zshrc runs once per shell, so Foundry is added exactly once. Re-sourcing zshenv via main_bash_setup or myrc no longer duplicates the entry.

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Note

Low Risk
Shell startup PATH ordering only; no auth, data, or application logic changes.

Overview
Fixes duplicate Foundry entries in PATH by moving export PATH="$PATH:$HOME/.foundry/bin" out of zshenv and into zshrc beside the linuxbrew toolchain line.

main_bash_setup re-sources zshenv during normal startup (early and again near the end of zshrc) and when reloading config via myrc, so a PATH append in zshenv ran multiple times per shell. zshrc is evaluated once per interactive shell, so Foundry is prepended exactly once.

^{Reviewed by Cursor Bugbot for commit 76d6e9f. Configure here.}