Refactor component terminology to programs in config and manifest

- Updated the terminology from "components" to "programs" across the codebase, including in config loading, saving, and manifest specifications.
- Introduced a new `stacks.py` file to handle lifecycle actions for development stacks, implementing handlers for Python and React Vite stacks.
- Adjusted tests to reflect the new program structure and ensure proper functionality.
- Revised documentation to align with the new terminology and structure, ensuring clarity on the purpose and configuration of programs, services, and jobs.

app/src/components/ServiceSection.tsx

@@ -1,10 +1,10 @@
 import { useMemo } from "react"
-import type { ComponentSummary, HealthStatus } from "@/types"
+import type { ServiceSummary, HealthStatus } from "@/types"
 import { ComponentCard } from "./ComponentCard"
 import { SectionHeader } from "./SectionHeader"
 
 interface ServiceSectionProps {
-  services: ComponentSummary[]
+  services: ServiceSummary[]
   statuses: HealthStatus[]
 }