Add architecture file

ARCHITECTURE.md

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+```mermaid
+---
+title: Tide Configure Flowchart
+---
+flowchart TD
+
+prompt_connection_andor_frame_color["prompt_connection_andor_frame_color
+(skipped if 16 color, or if there is no frame and no prompt connection)"]
+
+Style[style] --> prompt_colors
+
+prompt_colors -- "16 colors" --> show_time
+prompt_colors -- "True Color \n lean" --> show_time
+prompt_colors -- "True Color \n rainbow" --> show_time
+prompt_colors -- "True Color \n classic" --> classic_prompt_color
+
+classic_prompt_color --> show_time
+
+show_time -- "lean" --> lean_prompt_height
+show_time -- "classic" --> classic_prompt_separators
+show_time -- "rainbow" --> rainbow_prompt_separators
+
+lean_prompt_height -- "One Line" --> prompt_connection_andor_frame_color
+lean_prompt_height -- "Two Line" --> prompt_connection
+
+classic_prompt_separators --> powerline_prompt_heads
+rainbow_prompt_separators --> powerline_prompt_heads
+
+powerline_prompt_heads --> powerline_prompt_tails
+powerline_prompt_tails --> powerline_prompt_height
+
+powerline_prompt_height -- "One Line" --> prompt_connection_andor_frame_color
+powerline_prompt_height -- "Two Line" --> prompt_connection
+
+prompt_connection -- "lean" --> prompt_connection_andor_frame_color
+prompt_connection -- "classic" --> powerline_prompt_frame
+prompt_connection -- "rainbow" --> powerline_prompt_frame
+
+powerline_prompt_frame --> prompt_connection_andor_frame_color
+
+prompt_connection_andor_frame_color --> prompt_spacing
+
+prompt_spacing --> icons
+
+icons --> transient
+
+transient --> finish
+```